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0 The quantity of leachate generated in MSW landfills is dependent on the following factors: <br />r� <br />• Infiltration rate (affected by surface slope and cover design) <br />• Surface water run-on (which is prevented by the drainage facilities at the site) <br />• Evapotranspiration <br />• Waste field capacity <br />• Waste compression <br />• Age of the site <br />Leachate quality varies depending on the waste source, climate, season, site hydrology, cover <br />soil, and landfill age. The leachate generally contains significantly higher total dissolved solids, <br />electrical conductivity, and chloride than groundwater. <br />Factors the primarily affect the quality of leachate produced include: <br />• Composition of the waste <br />• Rate of decomposition <br />• Water infiltration rate <br />2.3.2.2 Leachate Collection and Recovery System <br />Leachate facilities are added and improved as needed. The leachate collection and recovery <br />systems at all Lined Areas the NCRC&SL include: <br />• Pipes placed on top of the geomembrane base liner intercept and carry leachate to <br />perimeter sumps <br />• Sump with dedicated pump in each Area <br />• Volumetric flow meter for each sump pump <br />• Infusion in upper elevations to receive leachate (primarily in Area 4) <br />North County RC&SL Page 9 of 68 Public Works/Solid Waste <br />Joint Technical Document County of San Joaquin — October 10, 2014 <br />